1 files changed, 285 insertions, 0 deletions

diff --git a/plugins/check_ssh.c b/plugins/check_ssh.c
new file mode 100644
index 0000000..d78189f
--- /dev/null
+++ b/plugins/check_ssh.c
@@ -0,0 +1,285 @@
+/*
+* check_ssh.c
+* 
+* Made by (Remi PAULMIER)
+* Login   <remi@sinfomic.fr>
+* 
+* Started on  Fri Jul  9 09:18:23 1999 Remi PAULMIER
+* Update Thu Jul 22 12:50:04 1999 remi paulmier
+* $Id$
+*
+*/
+
+#include "config.h"
+#include "common.h"
+#include "netutils.h"
+#include "utils.h"
+
+#define PROGNAME "check_ssh"
+
+#ifndef MSG_DONTWAIT
+#define MSG_DONTWAIT 0
+#endif
+
+#define SSH_DFL_PORT    22
+#define BUFF_SZ         256
+
+short port = -1;
+char *server_name = NULL;
+int verbose = FALSE;
+
+int process_arguments (int, char **);
+int call_getopt (int, char **);
+int validate_arguments (void);
+void print_help (void);
+void print_usage (void);
+
+char *ssh_resolve (char *hostname);
+int ssh_connect (char *haddr, short hport);
+
+int
+main (int argc, char **argv)
+{
+
+        if (process_arguments (argc, argv) == ERROR)
+                usage ("Could not parse arguments\n");
+
+        /* initialize alarm signal handling */
+        signal (SIGALRM, socket_timeout_alarm_handler);
+        alarm (socket_timeout);
+
+        /* ssh_connect exits if error is found */
+        ssh_connect (ssh_resolve (server_name), port);
+
+        alarm (0);
+
+        return (STATE_OK);
+}
+
+
+/* process command-line arguments */
+int
+process_arguments (int argc, char **argv)
+{
+        int c;
+
+        if (argc < 2)
+                return ERROR;
+
+        for (c = 1; c < argc; c++)
+                if (strcmp ("-to", argv[c]) == 0)
+                        strcpy (argv[c], "-t");
+
+        c = 0;
+        while (c += (call_getopt (argc - c, &argv[c]))) {
+                if (argc <= c)
+                        break;
+                if (server_name == NULL) {
+                        server_name = argv[c];
+                }
+                else if (port == -1) {
+                        if (is_intpos (argv[c])) {
+                                port = atoi (argv[c]);
+                        }
+                        else {
+                                print_usage ();
+                                exit (STATE_UNKNOWN);
+                        }
+                }
+        }
+
+        return validate_arguments ();
+}
+
+
+/************************************************************************
+*
+* Run the getopt until we encounter a non-option entry in the arglist
+*
+*-----------------------------------------------------------------------*/
+
+int
+call_getopt (int argc, char **argv)
+{
+        int c, i = 1;
+
+#ifdef HAVE_GETOPT_H
+        int option_index = 0;
+        static struct option long_options[] = {
+                {"version", no_argument, 0, 'V'},
+                {"help", no_argument, 0, 'h'},
+                {"verbose", no_argument, 0, 'v'},
+                {"timeout", required_argument, 0, 't'},
+                {"host", required_argument, 0, 'H'},
+                {0, 0, 0, 0}
+        };
+#endif
+
+        while (1) {
+#ifdef HAVE_GETOPT_H
+                c = getopt_long (argc, argv, "+Vhvt:H:p:", long_options, &option_index);
+#else
+                c = getopt (argc, argv, "+Vhvt:H:p:");
+#endif
+
+                if (c == -1 || c == EOF)
+                        break;
+
+                i++;
+                switch (c) {
+                case 't':
+                case 'H':
+                case 'p':
+                        i++;
+                }
+
+                switch (c) {
+                case '?':                                                                       /* help */
+                        usage ("");
+                case 'V':                                                                       /* version */
+                        print_revision (my_basename (argv[0]), "$Revision$");
+                        exit (STATE_OK);
+                case 'h':                                                                       /* help */
+                        print_help ();
+                        exit (STATE_OK);
+                case 'v':                                                                       /* verose */
+                        verbose = TRUE;
+                        break;
+                case 't':                                                                       /* timeout period */
+                        if (!is_integer (optarg))
+                                usage ("Timeout Interval must be an integer!\n\n");
+                        socket_timeout = atoi (optarg);
+                        break;
+                case 'H':                                                                       /* host */
+                        server_name = optarg;
+                        break;
+                case 'p':                                                                       /* port */
+                        if (is_intpos (optarg)) {
+                                port = atoi (optarg);
+                        }
+                        else {
+                                printf ("Port number nust be a positive integer: %s\n", optarg);
+                                usage ("");
+                        }
+                }
+
+        }
+        return i;
+}
+
+int
+validate_arguments (void)
+{
+        if (server_name == NULL)
+                return ERROR;
+        if (port == -1)                                                         /* funky, but allows -p to override stray integer in args */
+                port = SSH_DFL_PORT;
+        return OK;
+}
+
+
+/************************************************************************
+*
+* Resolve hostname into IP address
+*
+*-----------------------------------------------------------------------*/
+
+char *
+ssh_resolve (char *hostname)
+{
+        struct hostent *host;
+
+        host = gethostbyname (hostname);
+        if (!host) {
+                herror (hostname);
+                exit (STATE_CRITICAL);
+        }
+        return (host->h_addr);
+}
+
+
+/************************************************************************
+*
+* Try to connect to SSH server at specified server and port
+*
+*-----------------------------------------------------------------------*/
+
+int
+ssh_connect (char *haddr, short hport)
+{
+        int s;
+        struct sockaddr_in addr;
+        int addrlen;
+        int len;
+        char *output = NULL;
+        char *buffer = NULL;
+        char *ssh_proto = NULL;
+        char *ssh_server = NULL;
+        char revision[20];
+
+        sscanf ("$Revision$", "$Revision: %[0123456789.]", revision);
+
+        addrlen = sizeof (addr);
+        memset (&addr, 0, addrlen);
+        addr.sin_port = htons (hport);
+        addr.sin_family = AF_INET;
+        bcopy (haddr, (void *) &addr.sin_addr.s_addr, 4);
+
+        s = socket (AF_INET, SOCK_STREAM, 0);
+        if (!s) {
+                printf ("socket(): %s for %s:%d\n", strerror (errno), server_name, hport);
+                exit (STATE_CRITICAL);
+        }
+
+        if (connect (s, (struct sockaddr *) &addr, addrlen)) {
+                printf ("connect(): %s for %s:%d\n", strerror (errno), server_name,
+                                                hport);
+                exit (STATE_CRITICAL);
+        }
+
+        output = (char *) malloc (BUFF_SZ + 1);
+        memset (output, 0, BUFF_SZ + 1);
+        recv (s, output, BUFF_SZ, 0);
+        if (strncmp (output, "SSH", 3)) {
+                printf ("Server answer: %s", output);
+                exit (STATE_CRITICAL);
+        }
+        else {
+                strip (output);
+                if (verbose)
+                        printf ("%s\n", output);
+                ssh_proto = output + 4;
+                ssh_server = ssh_proto + strspn (ssh_proto, "0123456789-. ");
+                ssh_proto[strspn (ssh_proto, "0123456789-. ")] = 0;
+                printf
+                        ("SSH ok - protocol version %s - server version %s\n",
+                         ssh_proto, ssh_server);
+                buffer =
+                        ssprintf (buffer, "SSH-%s-check_ssh_%s\r\n", ssh_proto, revision);
+                send (s, buffer, strlen (buffer), MSG_DONTWAIT);
+                if (verbose)
+                        printf ("%s\n", buffer);
+                exit (STATE_OK);
+        }
+}
+
+void
+print_help (void)
+{
+        print_revision (PROGNAME, "$Revision$");
+        printf ("Copyright (c) 1999 Remi Paulmier (remi@sinfomic.fr)\n\n");
+        print_usage ();
+        printf ("by default, port is %d\n", SSH_DFL_PORT);
+}
+
+void
+print_usage (void)
+{
+        printf
+                ("Usage:\n"
+                 " %s -t [timeout] -p [port] <host>\n"
+                 " %s -V prints version info\n"
+                 " %s -h prints more detailed help\n", PROGNAME, PROGNAME, PROGNAME);
+}
+
+/* end of check_ssh.c */